 Have you heard of Parkinson's Law? This law says that work expands to fill the time that's available for its completion. And what this means is that if you tell yourself you're going to get an essay done in a whole day, then it's going to take you that whole day. But if you tell yourself you're going to get it done in four hours, then it will only take four hours. We can use this to our advantage when filling out our calendars using a technique called time blocking. Time blocking says that you give yourself half an hour, one hour, two hours or whatever to complete the task that you want to do. And the idea is that if you know it's going to take that much amount of time because you told yourself that's how long it's going to take, then you'll get the task done in the time you said.